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Measurements of isomeric yield ratios of fission products from proton- induced fission on natU and 232Th via direct ion counting
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
Department of Physics, University of Jyväskylä, P. O. Box 35(YFL), FI-40014 Jyväskylä, Finland.
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2017 (English)In: EPJ Web of Conferences, ISSN 2101-6275, E-ISSN 2100-014X, Vol. 146, 04054Article in journal (Refereed) Published
Abstract [en]

Independent isomeric yield ratios (IYR) of 81Ge, 96Y, 97Y, 97Nb, 128Sn and 130Sn have been determined in the 25 MeV proton-induced fission of natU and 232Th. The measurements were performed at the Ion Guide Isotope Separator On-Line (IGISOL) facility at the University of Jyväskylä. A direct ion counting measurement of the isomeric fission yield ratios was accomplished for the first time, registering the fission products in less than a second after their production. In addition, the IYRs of natU were measured by means of γ-spectroscopy in order to verify the consistency of the recently upgraded experimental setup. From the obtained results, indications of a dependence of the production rate on the fissioning system can be noticed. These data were compared with data available in the literature, whenever possible. Using the TALYS code and the experimentally obtained IYRs, we also deduced the average angular momentum of the fission fragments after scission.

Place, publisher, year, edition, pages
2017. Vol. 146, 04054
National Category
Subatomic Physics
Identifiers
URN: urn:nbn:se:uu:diva-319348DOI: 10.1051/epjconf/201714604054OAI: oai:DiVA.org:uu-319348DiVA: diva2:1086629
Conference
International Conference on Nuclear Data for Science and Technology, 11-16 september 2016, Bruges, Belgium
Available from: 2017-04-03 Created: 2017-04-03 Last updated: 2017-09-14Bibliographically approved

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